Won't switch audio engines
 

PT decided to default to my sound card. When booting up, reaches "initializing audio engine", I get a message that it can't initialize the audio engine. Click OK, switch to MOTU interface, click OK, startup screen returns to "initializing audio engine". After a few seconds I get the same message, when I click OK I see that it is still on my sound card, switch to MOTU, click OK, around and around and around. Switching to MOTU and hitting OK seems to take, but doesn't. Just keeps returning to internal computer sound card and will not stay with MOTU interface. This is after two years of running with Windows 10 and MOTU LP32.
Anyone?

Re: Won't switch audio engines
 

What if you press"N" while PT is starting (the regular way to select audio engines at PT launch)?

Re: Won't switch audio engines
 

It may be worth looking at your Windows sound Settings. There are several things that will cause Windows to grab the interface as its "default playback device" and Windows users need to set that to the on-board sound card. In recent history, that got changed on my rig by updating Windows, updating my graphics driver and updating my interface driver:o Another setting that often gets changed by a Windows 10 update is the Power Management feature on USB ports(aka "USB Root Hub" in Device Manager):o

Re: Won't switch audio engines
 

Ben, thanks for taking the time to make a suggestion. Unfortunately, I got the same result.
Albee, yes, at one point before posting I found that Windows had grabbed MOTU as the default audio driver. I corrected that and it did not help. Also already reinstalled MOTU, no help. Just checked Windows for all updates, there were a handful but not the sound card. I'm assuming all is OK with the USB connection because PT is seeing the MOTU, it just won't hold the selection when I choose it. It seems perhaps PT keeps selecting the sound card regardless of what I manually select, and I can't find anything in PT settings that would account for that. Thanks for your suggestions.

Re: Won't switch audio engines
 

hmmm, maybe go to Device Manager and disable the on-board sound completely(so Pro Tools can't use it)? If that allows PT to select the MOTU, then you can go back to Device Manager and re-enable the on-board sound. Shot in the dark:o

Re: Won't switch audio engines
 

Interesting shot in the dark. Disabling the sound card did indeed mean that PT only saw the MOTU, but it still failed to initialize the audio engine.
I completely uninstalled and reinstalled the MOTU to see if that would do anything.
It didn't.
Reinstalled PT drivers.
Nothing.
About to completely uninstall and reinstall PT.

Re: Won't switch audio engines
 

Stab in the dark - might be something to do with the motu and exclusive mode? I used to have issues with a Fireface, but can't remember if I needed exlcusive mode on or off. In the playback devices under proerties for the motu, 'allow apps to take exclusice control of this device" or something like that. Might be that it is enabled and Windows is taking exclusive control, not allowing PT to use it..?

Re: Won't switch audio engines
 

Also try delete and reinstall MOTU ASIO driver.

Re: Won't switch audio engines
 

This happened to me yesterday ... right after installing Source-Connect Pro.

Win 10, PT 2020.5, Focusrite LS56, system sound never to the LS56. New install of Source-Connect Pro. "Initialize audio engine" got "stuck", exactly as you describe above. After reboots & trashed prefs, I was able to get PT to default to the LS56 per usual. It seems the SC install hosed me. Any idea why? Thnx!!!

Re: Won't switch audio engines
 

If I start Pro Tools and forget to turn on my RME UFX, Pro Tools starts using the Source-Connect audio driver. Maybe PT kept seeing that first and then freaked? I'm on W10 too.